今天，犯了个笑话，晕倒～～

今天看了看C++中的模板，写了个简单的代码，然后分别用CodeBlocks和GNU/Linux上调试。在GNU/Linux上调试的时候犯了一个“超级低级”的错误，对自己无语了...废话不多讲了，直接上code：

@ header file queue.h

#ifndef QUEUE_H

#define QUEUE_H

#include

using namespace std;

template class Queue

{

public:

Queue();

~Queue();

void set(Type parm);

private:

Type m_parm;

};

template Queue::Queue()

{

cout << "ctor" << endl;

}

template Queue::~Queue()

{

cout << "dtor" << endl;

}

template void Queue::set(Type parm)

{

m_parm = parm;

cout << m_parm << endl;

}

#endif //QUEUE_H

@ source file: main.cpp

#include "queue.h"

int main(void)

{

Queue qi;

qi.set(10);

Queue qs;

qs.set("Hello World!");

return 0;

}

代码完全没有问题的啊。不过后来编译的时候用错了编译器，郁闷....

$ gcc -g main.cpp -o main

结果，出来了一大堆错误，崩溃啊

/cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o: In function `__static_initialization_and_destruction_0':

/usr/lib/gcc/i686-pc-cygwin/4.3.4/include/c++/iostream:77: undefined reference to `std::ios_base::Init::Init()'

/usr/lib/gcc/i686-pc-cygwin/4.3.4/include/c++/iostream:77: undefined reference to `std::ios_base::Init::~Init()'

/cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o: In function `main':

/cygdrive/e/SourceCode/C++/ClassTemplate/main.cpp:9: undefined reference to `std::allocator::allocator()'

/cygdrive/e/SourceCode/C++/ClassTemplate/main.cpp:9: undefined reference to `std::basic_string, std::allocator >::basic_string(char const*, std::allocator const&)'

/cygdrive/e/SourceCode/C++/ClassTemplate/main.cpp:9: undefined reference to `std::basic_string, std::allocator >::~basic_string()'

/cygdrive/e/SourceCode/C++/ClassTemplate/main.cpp:9: undefined reference to `std::basic_string, std::allocator >::~basic_string()'

/cygdrive/e/SourceCode/C++/ClassTemplate/main.cpp:9: undefined reference to `std::allocator::~allocator()'

/cygdrive/e/SourceCode/C++/ClassTemplate/main.cpp:9: undefined reference to `std::allocator::~allocator()'

/cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o: In function `Queue':

/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::cout'

/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::basic_ostream >& std::operator<< >(std::basic_ostream >&, char const*)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::basic_ostream >& std::endl >(std::basic_ostream >&)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::basic_ostream >::operator<<(std::basic_ostream >& (*)(std::basic_ostream >&))'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o: In function `~Queue': cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::cout'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_ostream >& std::operator<< >(std::basic_ostream >&, char const*)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_ostream >& std::endl >(std::basic_ostream >&)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_ostream >::operator<<(std::basic_ostream >& (*)(std::basic_ostream >&))'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:30: undefined reference to `std::basic_string, std::allocator >::operator=(std::basic_string, std::allocator > const&)'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::cout'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::basic_ostream >& std::operator<< , std::allocator >(std::basic_ostream >&, std::basic_string, std::allocator > const&)'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::basic_ostream >& std::endl >(std::basic_ostream >&)'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::basic_ostream >::operator<<(std::basic_ostream >& (*)(std::basic_ostream >&))'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o: In function `Queue': cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:18: undefined reference to `std::basic_string, std::allocator >::basic_string()' cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::cout'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::basic_ostream >& std::operator<< >(std::basic_ostream >&, char const*)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::basic_ostream >& std::endl >(std::basic_ostream >&)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::basic_ostream >::operator<<(std::basic_ostream >& (*)(std::basic_ostream >&))'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:20: undefined reference to `std::basic_string, std::allocator >::~basic_string()'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o: In function `~Queue': cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::cout' cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_ostream >& std::operator<< >(std::basic_ostream >&, char const*)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_ostream >& std::endl >(std::basic_ostream >&)'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_ostream >::operator<<(std::basic_ostream >& (*)(std::basic_ostream >&))'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_string, std::allocator >::~basic_string()'

 cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:25: undefined reference to `std::basic_string, std::allocator >::~basic_string()'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::cout'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::basic_ostream >::operator<<(int)'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::basic_ostream >& std::endl >(std::basic_ostream >&)'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:/cygdrive/e/SourceCode/C++/ClassTemplate/queue.h:31: undefined reference to `std::basic_ostream >::operator<<(std::basic_ostream >& (*)(std::basic_ostream >&))'

 cygdrive/c/DOCUME~1/meego/LOCALS~1/Temp/ccQWEhNY.o:main.cpp:(.eh_frame+0x12): undefined reference to `___gxx_personality_v0'

          ld returned 1 exit status

仔细看了看，发现原因了。原来我正在用C语言编译器来编译C++的代码，真是令人崩溃。让人意想不到的错误。